题目内容

1.成人胸外按压的陈述，正确的是（）

A按压频率每分钟至少100次
B胸骨下陷不超过5cm
C. D胸骨下压时间长于放松时间
D. D胸骨下压时间长于放松时间

查看答案

搜索结果不匹配？点我反馈

更多问题

Some people believe fast and loud music is ______ and help people have fun.

point along an ever increasingly harder route. While not an Olympic event, rock climbing is 3. by the International Olympic Committee as a sport. Rock climbing has been

______ several different styles and sub-disciplines. At its most basic, rock climbing

,and balance along with their mental control. It can be a dangerous sport and climbers are 10. when they go climbing However, the risk can be reduced by having the knowledge of proper climbing techniques and using specialized climbing equipment.